I-Lactose iyi-disaccharide etholakala emikhiqizweni yobisi oluncelisayo, ehlanganisa i-molecule eyodwa ye-glucose ne-molecule eyodwa ye-galactose. Iyingxenye eyinhloko ye-lactose, umthombo wokudla oyinhloko wabantu nezinye izilwane ezincelisayo ngesikhathi sosana. I-Lactose idlala imisebenzi ebalulekile emzimbeni womuntu. Iwumthombo wamandla.